Wheel of Fate effects

Is there a way to activate the wheel of fate effects on individual players? Most of the effects are things you can activate with server commands but I had an idea of some kind of pickup that players could collect that would give them one of these effects at random. Effects like uber, big head mode, covered in Jarate, bomb head mode, as well as making their player model smaller for a short time.

Is it possible to do these things with existing in game entities? I don't know anything about scripting for making plug ins or anything like that.